Xperia Tablet Z can be used to charge the Xperia phone

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Want to see the world’s thinnest 10-inch tablet in action? The folks at Diginfo.tv were lucky enough to spend some quality time with a Sony spokesperson and the Xperia Tablet Z, the company’s 6.9mm thick wonderslab.

Sony’s understandably excited about the Xperia Z. The showfloor presentation keys in on its portability, which Sony says is all about the thin profile and light weight. At roughly seventeen ounces, it’s almost a half a pound lighter than the iPad. Sony says that makes the Xperia Tablet Z easy to slip into a bag without it becoming a burden. That’s assuming your satchel of choice is large enough to accommodate a 10-inch diagonal slate, of course.

If you thought that the water resistant and dustproof properties of the Xperia Z devices were the only tricks up their sleeves, think again. It turns out Sony has designed the tablet and phone to be perfect companion devices. This goes way beyond NFC tap interactions, though those are supported. Sony has actually built one positively genius new feature into the tablet.

Hook up the custom micro USB cable, and you can actually charge your Xperia Z phone from the tablet’s battery. Sony‘s already taken some heat for the 6000mAh capacity, but if it allows the Xperia Tablet Z to be this small and light and still act as an emergency power source for your phone, then it’s well worth the drop in endurance.

Let’s face it, if you have to pick one device in your bag to have power it’s going to be your phone. Your tablet — especially if it’s Wi-Fi only — won’t do you any good if you need to call a cab, a tow truck, or 911.